Aldsox



A. F. DNALDSON.

INNER AND OUTER BROACHING MACHINE.

APPLICATION FILED" MAY 1.9. 191.7. 1,318,486.

laltentod 0c. 9,1919.

5 SHEETS- I.

Patented Oct. 14, 1919. L 5 SHEETS-SHEET 2.

f A 5,., a

NWIIIJIIIIIMIII L A. F. DONALDSON.'

yINNER AND OUTER BROADHING MACHINE.

APPLICATION FILED MAY I9, 19H.

A. F. DONALDSON.

i AND OUTER BROACHING MACHINE.

APPLICATION man MAY 19. 1911.

1,318,486. Patented 0f f.14,1919.

5 SHEETS-SHEET 3.

A. F. DONALDSON.

INNER AND OUTER BROACHING MACHINE.y

APPLICATION FILED MAY I9. 19H.

1,318,486. wenn@ om. 11, 1919.

5 SHEETSSHEET 4.

A. F. DONALDSON, INNER AND OUTER BROACHING MACHINE.

APPLICATION FILED MAY I9, 1911.

' Patented 0c-t14,1919.

5 SHEETS-SHEET 5.

UNITED STATES PATENT OFFICE. I

AUGUSTUS F. DONAIJDSON, F TOLEDO, OHIO` ASSIGNOR TO THE BUNTING BRASS c4BRONZE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

INNER lAND OUTER BROACHING-MACI-IINE.

Specification of Letters Patent.

Patented Oct. 1 4, 1919.

Application filed May 19,` 19177. Serial No. 169,644.

To a?? whom z5 may concern.'

Be it known that I, AUoUs'rUs F. DON- ALDsoN, a citizen of the UnitedStates, and a resident ot' Toledo, in the county of Lucas and State ofOhio, have invented a certain new and useful Inner and Outer Broaching-Machine; and I do hereby declare the -following to be a full, clear, andexact de-k scription of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the charactersof reference marked thereon, which forni a part of this specification.

hly invention has for its object to provide a broaching machine forbroaching the exterior of c vlindrical objects. It also has for itsobject to provide a machine that will broach the interior as well as theexterior of articles, such as bushings, .in the same stroke. oroperation of the machine. Automatic feed mechanism ma \v be provided fordirecting thel articles to and away from the ln'oaching tools.

The invent-ion may be contained in many forms of constructions, all ofwhich come within the purview of .my claims hereinafter appended. Forpurposes of illustration I have selected one of such constructions as anexample of the many constructions and arrangement of parts containingthe invention, and shall describe it hereinafter. The

construction selected is illustrated :in the accompanying drawings.

Figure 1 ot the drawings is a side View of the construction except forthe actuating mechanism which may be of any suitable character and whichforms no part of my invention'. Fig. 2 illustrates a part of the feedactuating mechanism. Fig. 3 illustrates a section taken on the line 3-3indicated in Fig. 1. Fig. 4 illustrates a top view of the construction.Fig. 5 is a broken view of a section of the-.construction taken on line5 5 indicated in Fig. 9. Fig. G illustrates a stripper for removing thebushings trol-n one of the breaches. Fig. 7 illustrates a roughingexterior broach ring. Fig. S is a sectional view taken online 8 8 in`Fig. 4.- Fig. 9 isa sectional View taken on line 9 9 indicated in Fig.1.y Fig. 1() is a sectional. view taken on line 10-10 indicated in Fig.-l. Fig. 11 is a view similar to that of Fig. 9,' except that the feedmecha- `the feeding mechanism.

nismis moved a-short distance in its feeding operation. Fig. 12 is aview of a part of Fig. 13 is a sectional view taken on line 13-13indicated in Fig. 11. Fig. 14 is a sectional View taken on line 11-141indicated in Fig. 4, and Fig.

illustrates a cam for opening a feed locking mechanism.

1, Fig. 1, is the ram, 3-1 is the bed plate, 3, Fig. 8, is'thc outsidebreach, and -LL is the inside breach. The ram is moved up and down b vany suitable means, such as a crank and connecting rod, to producerelative mo'ements ot the bushings and breaching too s.

The bushings 5 are fed into a tube (i by hand or by any suitable means.The tube (3 is supported in a sleeve secured to a bracket 11 and islocated over afeed-plate 8, that is supported on a rod 9 for rotativemovements, that is secured in a sleeve 10 forming a part of the bracket11 that is secured to the ram 1. The plate S is rotated by means ot' apair ot bevel-gears 12 and 13, which are rotated by a shaft 1-1 and aspur-gear 15 l connected to the shaft l-L, operated upon by stop 21, asshown in Fig. 12, whereupon the gear-wheels 15, 13 and J2 are rotated.The lower tace of the gear-wheel 12 is provided with a ratchet Q1, Whilethe plate 8 is provided with a spring pressed pin 25, Inovable in asleeve 26 against a compression spring 27, located between a shoulder onthe pin and the bottom of the sleeve and is limited in its movements bya pin 28, that moves in a slot 29 locat'ed in the sleeve 26.

The ratchet 24 engages the pin 25 and thus rotates the plate one step.Upon the return movement of the ram 1 and bracket 18 the rack 16 iscarried down until it strikes the stop 22, which causes re-rotation ofthe gear-wheels 15, 13, and 12, while the plate 8 is held in itsposition as hereinafter described, and thus causes another tooth of theratchet 24 to engage the pin 25. Upon a return movement the rack 16again strikes the stop 21 and again causes the plate to move anotherstep forward.

The plate 8 is provided with a plurality of openings in which arelocated sleeves 26, that pass beneath the tube 6 thereby receivingbushings from the tube, which are conveyed between the broaching toolsby the plate '8. `The external broacliiiig tool 3 is formed of ringsthat are secured in a socket in the end of the sleeve 27 secured to theram 1, by means of a threaded ring 28. Any number of rings may be thussecured. I have shown two rings 29 and 30, the first is a cutting ringwhich removes the surface o f the bushing when the bushing is pushed ithrough the rings; the second is a burnishing ring which smoothes thesurface of the bushings. `The irst is provided with a serrated cuttingedge having raised cutting portions 31, the outer surfaces of whichpartake of the form of a cone and intermediate cutting portions 32formed along the sides of the raised portions and iii the channelsbetween the raised portions which greatly eX- teiids the length of thecutting edge and prevents over-crowding of the metal and tends to breakup the chips formed in the cutting operation. The ring 30 is providedwith a beaded surface 33, which burnislies and slightly compacts thesurface of the bushing.

The other broach 4 is secured to the bed 34 by means of a collar 35,which is clamped by a nut 36 onto the lower end of the-broach and whichis locked into the bed 34 by any suitable means, such as a turn-button37. The broach is provided with a long pilot 38, cutting lips 39 and 40,conipacting beads 4l and 42, a long cylindrical portion 43 and ashoulder 44. The pilot 38 has a rounded or beveled nose 45 for directingthe bushing over the broach.

In the breaching operation the bushin s 5 are brought into alinemeiitwith the broac iing tools y the movements of the plate 8, and the ramcarries the plate 8 downward so that the bushing in broaehing positionis carried over the nose 45 of the broach 4, which pushes the bushing upagainst the surfacing rin i 29 and lby reason of the greater -resistanceo ered to the bushing by the cutting ring 29 the bushing is carried downover the broach 4 that cuts and compacts its inner surface until thebushing is pressed against the shoulder 44 of the broach 4 whereupon thebushing is held in position while the broach 3 passes over the bushingcutting and slightly coinpactiiig the outer surface of the bushing.

During the broaching operation a means may-be provided for securelyholding the broaching tools relative to each other and thus producingco-axial surfaces. A movable sleeve 46 may be located in the sleeve 27.The pilot 38 "snugly lits the sleeve 46 and enters the sleeve whichholds the broach 4 relative to the broaching tool 3 as the sleeve 46slides along the sleeve 27. Upon the return movement of the broach 3 thebushing is caught by a spring ring 47 (Fig. 6), that is located in thesocket above the ring 30 and provided with a beveled edge 48 to permit'the bushing to ass the ring in its upward movement. he iiiig, however,will engage the lower end of the bushing'on its return movement andprevent it from entering the ring 30. The bushing will thus be strippedfrom the broach 4 and will remain in the sleeve 27 until it is ejectedthere from.

An ejector rod 50 may be supported in a rod 51 secured in the ram 1. Theouter end of the ejector rod has a pair of rollers 52 located onopposite sides of a cani-bar 53, that is bolted to an uprightJ 54secured to one of the guides 29 of the ram. The upper end of the bar 53is inclined toward the ram so as to push the rod 50 inward. The innerend of the bar 50 is located in an opening in the sleeve 27 whileopposite the bar 50 is located a second opening in the sleeve 27 largeenough to permit the bushing to be l hind the broach.

When the ram is moved down to near the lower end of its stroke thebroach 4 is located in one of the sleeves 26 and the rack 16 strikes thelower stop 22, which causes the reverse movements of the gear-wheels 15,13 and 12, the plate 8, however, being held stationary by the broach4.This permits tlie ratchet 24 to move back and cause another of its teethto engage the pin 25' so that when the rack is lifted by the Wheel 15and it strikes the stop 21 the ratchet is again caused to move the plate8 another step, the plate 8 having been pulled clear of the broach 4.

The plate is also locked in position as the bushing slips over the noseof the broach 4 by a spring pressed pin 55 located in a sleeve 56'secured by a collar 57 to the ram 1 and is actuated by a spring 58located in the sleeve between the end of the pin and the ram 1 and alsoby a cam 59, which is secured to the gear-wheel 12. The cam 59 operateson a beveled shoulder 60 to lift beth whenv the rack is held by the stepA21v of the last teeth to engage with the pinA thereby insuring that thenext te engage the pin will move Well to the rear of the pin 25 and thusmake certain the neXt fer- Ward movement of the plate. The plate is thusstepped around and the bushings are fed te the breaching tools andejected from the machine by the rod 50. f

I claim:

, 1. In a breachin machine, the combination of an outside reach, meansfor feeding bushings te the breach, means for producing relativemovements of the breach and bushing, means located on the folloW- ingside of the breach for engaging the bushing to prevent the return of thebushing in the breach; and means for ejecting the bushings from behindthe breach.

2. In a breaching machine, the combination of an outside breach and aninside breach, and the inside breach having means for pushing thearticles through the outside breach.

3. In a breaching machine, the combination of an outside breach and aninside breach, means for operating the inside breach te push articlesthrou h the outside breach, and a stripper means .,ocated on thefollowing side of the outside breach for removing the bushings from theinside breach.

4. In a breaching machine, the combination of an outside breach and aninside breach, means for operating the inside breach to pusharticles'through the outside breach, a strippermeans-lecated on thefellewing side of the eutsidebroach for removing the bushing from theinside breach, and means for ejecting the bushing from the outsidebreach.

5. In a breaching machine, the combination of an outside and an insidebreach, means for feeding the articles te be operated upen by thebreaches, and means for causing one of the breaches te engage thearticles fed thereto and moving them relative to the other breach.

6. In a breaching machine, Aa ram, an outside breachcennected to theram, a feeding means connected te and reciprecated with the ram forfeeding the article beneath the b-roach.

7. In a breaching machine, an inside and an outside breach, means formoving the breaches relative te each other, each breach operating teforce the 'article along the.

other breach 8. In a breaching machine, an inside and ein the outsidebreach for removing the articles from vthe inside breach.

9. In a breaching machine, an outside breach, means for forcing thearticles through the outside breach and a spring member for engaging thearticle te remove it from the said means.

10. In a breaching machine, a breach, a spring pressed clamping memberfor slipping by .and engaging the articles te strip them frernthe breachand preventing the return ef the articles through the outside breach.

l1. In a breaching machine, a breach, a

pair of spring pressed jaws opened by movement of the article en thebreach through the jaws for engaging the articles te strip them from thebreach.

' 12. In a breaching machine, an outside breach. and an inside breach,the inside breach having means for pushing the articles through theoutside breach, and means for receiving the receiving end of the insidebreach and holding it coaxial With the outside broach.

13. In a breaching machine, an outside breach and an inside breach, acollar for receiving the receiving end ef the inside breach, meansconnected to the outside breach for guiding the collar and maintainmg itin axial alinement with the outside breach.

14. In a breaching machine, an outside breach and an inside breach, theinside breach having a pilot of length sulicient to extend through thearticle, a movable member for receiving the pilot and means forretaining the einher in aXial alinement With the outside breach.

15. In a breaching machine, an outside breach and an inside breach,means for forcing the breaches over and through the article, a guidemember for receiving the inside breach and maintaining the inside breach'and the article in axial alinementvvith the outside breach. j 16. In abreaching machine, an outside breach and an inside breach, means forfore-- v4lng the breaches over and-through the article, a`- guide memberfor receiving the inside breach and maintaining the inside breach andthe article in axial alinement With the outside breach, means locatedbetween the outside breach and the guide member for stripping thearticle from the inside breach.

17. In a breaching machine, an outside breach and an inside breach,means for forcing the breaches over and through the article, a strippermember for engaging the article when it has passed through the eutsidebreach and over the inside breach.

18. In a breaching machine, an outside breach and an inside breach,means for fercing the breaches over and through the article, a strippermember for engaging the article when it has passed through the eutsidebreach and over the inside breach, and means for ejecting the articlefrom the niember.

19. In a machine for-breaching articles, the combination of an outsidebreach, means `for producing relative movements ef the tion of anoutside breach, means for pre-V ducing relative movements ofthe breach`and the article operated on by the breach, and a vielding means locatedon the following side of the breach for permitting the article te passthrough thel breach and the said means` and engaging the article topre.- vent the return of the article through the breach.

In a breaching machine, a breach, a member having spring-pressed jawsopened by the movement of the articles through the jaws for stripping itfrom the breach.

In a machine for breaching' bushings, a" breach having a guide pilot.having a length sufficient te extend through the bushing, means forholding the bushing, a guide for receiving the pilot for holding thepilot and breach 1n a. definite relation with respect to the bushingduring the breaching of the bushing.

v24. In a machine for breaching bushings, an outside breach and aninside breach, a. ram connected te one ef the breaches and means forfeeding bushings te be operated upon by the breaches between thebreaches.

In a machine for breaching bushings, an outside breach and an insidebreach, :L ram connected te one of the breaches, means for feeding thebushings to be operated upon by the breaches, and an ejecting meansoperating to eject the articles from the following side of the outsidebreach.

2G. In a machine for breaching bushings, an outside breach and an insidebreach, a rain connected te one of the breaches, means for feedingbushings to be operated upon by the breaches, and a yieldabhl strippermember located en the following end of the outside breach for engagingthe bushing to strip it from the inside breach.

Q7. In a machine for breaching bushings, an outside breach and an,inside breach, a ram connected te one of the breaches, means forfeeding bushings to be operated upon bv the breaches, a yieldablestripper member located en the following end of the outside. breach forengaging the bushing to `strip it from the inside breach, and anejecting means for ejecting the bushings from the following side of theoutside breach.

In testimoniv whereof I have hereunto signed mv name. to thisspecification.

UeUs'rUs it noNaLnsoN.

